I bought some FBs new for dd and ds. Turns out ds gets a rash every time he wears them (fleece allergy I think). I bought them brand new and have ds who will eventually grow into them so I hate to sell them but I also hate them sitting around not getting used. I have some gerber prefolds and I was wondering if anyone had ever used FBs as a cover. Also, I have no clue as to how a prefold works (other than as a spit rag, ). Is there someplace that has instructions or a how-to-prefold?

It would be perfectly fine to use them as a cover or an AI2 since your laying in the prefold. Just fold in thirds and you are good to go!

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SAHM to 5 spoiled adorable kids
Anjali Catya born August 25th and is just a little doll! We all love her to pieces!
ISO: HANNA ANDERSSON size 80-90 GIRLS or GENDER NEUTRAL and BOYS size 100-120

I don't know if you sew, but if you wanted to get some really good absorbancy, you could trifold a microfiber towel from the auto dept. at Walmart and sew flannel on top (so the skin isn't against the microfiber-though it doesn't bother my girl even when it is). You could even lay it flat and then sew a square of flannel and then trifold it. Microfiber will hold a lot more than a Gerber prefold. You could also, for extended times, put the microfiber/flannel on top and stuff the pocket with the prefold.